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Finding the Fourth Proportional to 402.66, 555.86 and 236.82

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Solution

The fourth proportional to 402.66, 555.86 and 236.82 is: 326.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.66 : 555.86 = 236.82 : x
  2. Step 2: Convert to fraction form
    402.66/555.86 = 236.82/x
  3. Step 3: Cross multiply
    402.66x = 555.86 × 236.82
  4. Step 4: Simplify right side
    402.66x = 131,638.77
  5. Step 5: Solve for x
    x = 131,638.77/402.66
  6. Step 6: Final answer
    x = 326.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.